Răspuns :
a= nr natural
[(a+28)x2]:48=3024
[(a+28)x2]=3024x48
(a+28)x2=145152
(a+28)=145152:2
a +28=72576
a=72576-28
a=72548
[(a+28)x2]:48=3024
[(a+28)x2]=3024x48
(a+28)x2=145152
(a+28)=145152:2
a +28=72576
a=72576-28
a=72548
a+28)×24]-48=3024
a+28=(3024+48):24
a+28=128
a=128-28
a=100
verificare:100+28)×24]-48=3024
a+28=(3024+48):24
a+28=128
a=128-28
a=100
verificare:100+28)×24]-48=3024